1、APIService为自定义接口类，
定义@Headers
@Headers({"Content-Type: application/json","Accept: application/json"})
@POST
Call<ResponseBody> Test(@Url String url,@Body RequestBody route);//测试使用@Url
2、调用代码如下，使用了Call<ResponseBody>，
APIService req;
req = RetrofitManager.getInstance().createReq(APIService.class); HashMap hashMap = new HashMap(); Retrofit retrofit=new Retrofit.Builder() .baseUrl(AppConfig.BASE_URL) .build(); APIService postRoute=retrofit.create(APIService.class); RequestBody body=RequestBody.create(okhttp3.MediaType.parse("application/json; charset=utf-8"),datas);//datas是json字符串 Call<ResponseBody> call=postRoute.Test("/test.shtml?type=test",body); call.enqueue(new Callback<ResponseBody>() { @Override public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) { try { String json = response.body().string(); JSONObject jObject1 = new JSONObject(json); String result = jObject1.getString("result"); String message = jObject1.getString("message"); if (!result.equals("0"))//不为0异常 { showToast("异常:"+message); } else { showToast("成功:"+message); } } catch (Exception ex) { }